A Study to Assess an Auto-injector Being Used to Treat a Migraine Attack

The purpose of this research study is to evaluate an investigational auto-injector system for delivering sumatriptan under the skin for a single migraine attack. The study could take approximately 5 weeks and will include about 3 office visits to the study doctor, the patient will be contacted every 2 weeks until the patient experiences a migraine and uses the auto-injector. The last visit will be done by a telephone follow-up call.